Beer costs $4 and movies cost $6. If J.P. has $24, how much of each
will he buy?
If you draw in J.P.'s budget constraint, you can see that the
optimal point would be at about 2 movies and 3 beers.

Optimizing J.P.'s Purchase

Problem :
Draw the indifference curves for cashmere sweaters and moth-eaten
sweaters (assuming that moth-eaten sweaters are undesirable and cashmere
sweaters are desirable).

Indifference Curves for Normal Undesirable Goods

Problem :
Lawrence is looking for tables and chairs. His indifference curves
look like this:

Lawrence's Indifference Curves

He has $500 to spend, how many tables and chairs will he buy if chairs
cost $50 and tables cost $100?
If you draw in Lawrence's budget constraint, you can see that his
optimal combination would be about 3 tables and 4 chairs.